Weather in O'Fallon, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for O'Fallon
Overnight |
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Temperature: 68°F Wind Speed: 8 mph Wind Direction: SE Forecast: Mostly cloudy, with a low around 68. Southeast wind around 8 mph. |
Thursday |
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Temperature: 90°F Wind Speed: 8 to 17 mph Wind Direction: S Forecast: Isolated showers and thunderstorms after 4pm. Partly sunny. High near 90, with temperatures falling to around 86 in the afternoon. South wind 8 to 17 mph. Chance of precipitation is 20%. |
Thursday Night |
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Temperature: 63°F Wind Speed: 6 to 14 mph Wind Direction: SW Forecast: Isolated showers and thunderstorms before 8pm. Partly cloudy, with a low around 63. Southwest wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%. |
Friday |
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Temperature: 86°F Wind Speed: 6 to 17 mph Wind Direction: SW Forecast: Showers and thunderstorms likely after 1pm. Mostly sunny. High near 86, with temperatures falling to around 78 in the afternoon. Southwest wind 6 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. |
Friday Night |
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Temperature: 60°F Wind Speed: 8 to 15 mph Wind Direction: SW Forecast: Showers and thunderstorms likely before 1am. Mostly clear, with a low around 60. Southwest wind 8 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. |
Saturday |
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Temperature: 78°F Wind Speed: 8 to 12 mph Wind Direction: W Forecast: Sunny, with a high near 78. |
Saturday Night |
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Temperature: 58°F Wind Speed: 2 to 8 mph Wind Direction: NW Forecast: Partly cloudy, with a low around 58. |
Sunday |
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Temperature: 78°F Wind Speed: 6 mph Wind Direction: E Forecast: A chance of rain showers after 7am. Mostly sunny, with a high near 78. Chance of precipitation is 30%. |
Sunday Night |
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Temperature: 61°F Wind Speed: 8 mph Wind Direction: E Forecast: A chance of rain showers before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%. |
Monday |
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Temperature: 78°F Wind Speed: 10 mph Wind Direction: E Forecast: Showers and thunderstorms likely. Mostly cloudy, with a high near 78. Chance of precipitation is 60%. |
Monday Night |
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Temperature: 66°F Wind Speed: 10 mph Wind Direction: SE Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%. |
Tuesday |
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Temperature: 82°F Wind Speed: 12 to 15 mph Wind Direction: SE Forecast: Showers and thunderstorms. Mostly cloudy, with a high near 82. Chance of precipitation is 80%. |
Tuesday Night |
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Temperature: 64°F Wind Speed: 10 to 14 mph Wind Direction: S Forecast: Showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 80%. |
Wednesday |
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Temperature: 78°F Wind Speed: 13 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 40%. |